Uproar Grows Over Minister's Order to Probe Birmingham's Muslim-Majority Institutions

BIRMINGHAM, England—A government-ordered investigation into the conduct of Muslim-majority schools in this city has turned into an embarrassing intramural argument for the ruling Conservative Party, as two senior party leaders have accused each other of failing to curb extremism.

Britain's education minister will make his first report to Parliament on Monday on the investigation he ordered into allegations that some Muslim school administrators in Birmingham were plotting to radicalize Muslim students. The probe, dubbed...